Upgrade Receiver or go Preamp/amp route?

[bmwme]

I just don't think you're going to see much difference between 100wpc and 110wpc, even if the latter is more "real" than the former (and Marantz has been pretty good with their numbers in the past). Twice the power to deliver 3db more and all that.

I'd love to just simplify it all and get a Marantz reciever rather than a prepro so if a receiver can get me close to what the Rotel amp can get that would be great.